Better file existance checks.

mesonbuild/mesonlib.py

@@ -95,12 +95,7 @@ def is_32bit():
     return not(sys.maxsize > 2**32)
 
 def is_debianlike():
-    try:
-        with open('/etc/debian_version', 'r'):
-            pass
-        return True
-    except FileNotFoundError:
-        return False
+    return os.path.isfile('/etc/debian_version')
 
 def exe_exists(arglist):
     try:

test cases/common/16 configure file/generator.py

@@ -1,13 +1,11 @@
 #!/usr/bin/env python3
 
-import sys
+import sys, os
 
 if len(sys.argv) != 3:
     print("Wrong amount of parameters.")
 
-# Just test that it exists.
-with open(sys.argv[1], 'r') as ifile:
-    pass
+assert(os.path.exists(sys.argv[1]))
 
 with open(sys.argv[2], 'w') as ofile:
     ofile.write("#define ZERO_RESULT 0\n")